Barknor Fort Ruins is an old, ruined castle and archeological site in East Bushington. It is unique in the area in that it is the only castle in the country built on a hill. It's also the only castle to begin with, so 1:1, would mint. In the year 1155, fortifications were erected at the site by Goswin the Grand. The totally original wooden keep (definitely not copied from some other castle) survived until 1156 when it was destroyed under siege by Farknard the Dandy. It was rebuilt in the centuries that followed but again destroyed in a siege, this time by Rudolph the Bearded.
The castle suffered heavily in the first Chicken Tuna war of 1338 as it wasn't built to withstand a whole lot of firepower. Because of it, the castle was left in a state of disrepair with its once so magnificent towers now collapsed and its roofs burned to ashes. New parts have been continuously built upon the existing ones, making it somewhat of a Frankenstein's monster of a castle. An example of this is the current main dining hall, which was built atop the toilets of its previous incarnation. No one particularly liked that architectural decision and the castle was eventually abandoned in the early 1700s. Climate change was subsequently used by invading forces to drown a significant part of the castle in the later years of its existance. This effectively rendered it useless as a defensive position. Except maybe to fend off attacking mackerels.